How many fully established neighbour relationships exist on an Ethernet with five routers running OSPF as network type broadcast?

The correct answer is C. 7. Assuming routers R1-R5, R1 is elected DR, R2 BDR. Fully established neighborships only occur to DR and BDR, all other neighbors are in 2Way DR other state. DR|BDRFull relationships:

Designing Network Infrastructure

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How the community answered

(43 responses)

A
5% (2)
B
2% (1)
C
91% (39)
D
2% (1)

Explanation

Assuming routers R1-R5, R1 is elected DR, R2 BDR. Fully established neighborships only occur to DR and BDR, all other neighbors are in 2Way DR other state. DR|BDRFull relationships:

Topics

#OSPF broadcast#DR/BDR election#neighbor adjacency#network type

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